<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>动态参数求和</title>
</head>
<body>
  <script>
  function getSum(){
  let sum=0
    for(let i=0;i<arguments.length;i++){
          sum+=arguments[i]
     }
     return sum
  }
  console.log(getSum(1,2,3,4,5,6,7))
  </script>
</body>
</html>